create_subtasks

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden. It does not disclose whether subtasks are appended or replace existing ones, what permissions are needed, what happens with an invalid task_id, or what the tool returns. For a mutation tool this is a substantial gap.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Two short sentences with the action front-loaded and no wasted preamble. The second sentence is mildly redundant with the first but still orients the agent quickly.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple two-parameter creation tool with no output schema and no annotations, the description is minimally sufficient to invoke but omits append-vs-replace semantics, error behavior, and return shape. It is adequate but leaves the agent guessing on mutation details.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so both parameters (task_id, subtasks) are already documented in the schema. The description adds only the conceptual framing of subtasks, no format or constraint detail beyond the schema. Baseline 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb ('Add') and resource ('subtasks to a task'), making the operation unambiguous. It does not differentiate itself from any sibling nor clarify how the added subtasks relate to existing ones, but the core purpose is clear.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

'Can be used to break a task into smaller pieces' implies the use case but gives no guidance on when this is preferable to alternatives, prerequisites, or what happens if the task already has subtasks. Usage is only implied, not specified.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.